Unit 2: Atoms, Periodic Table and Bonding

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• X

• Y

• Z

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NGSS.MS-PS1-1

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NGSS.MS-PS1-1

A neutral atom of which element contains 10 electrons?

• boron

• fluorine

• lithium

• neon

• atom

• isomer

• ion

• quark

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NGSS.MS-PS1-1

Which statement BEST describes the characteristic shared by three isotopes of an element?

• The isotopes share the same number of protons.

  
  

• The isotopes share the same chemical stability.

• The isotopes have the same atomic mass.

  
  

• The isotopes have the same number of neutrons.

Which magnesium ion is represented in the model?

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NGSS.MS-PS1-1

Which statement is true about atoms?

• Some atoms only contain electrons.

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  Some atoms only contain neutrons.

• Some atoms lack a nucleus.

• Some atoms lack a neutron.

In order to determine if two atoms are copper (Cu) atoms, what must be the same for each?

• the number of valence electrons

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  the number of protons

• the charge of the atom

• the size of the atom

Which model represents a particle with no charge?

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NGSS.MS-PS1-1

Looking at the nuclear notations below, what is the neutron number of both of the elements below?  What is the relationship of the two elements below?

• U-235 has 235 neutrons, U-238 has 238 neutrons and they are isotopes of each other.

• U-235 has 143 neutrons, U-238 has 146 neutrons and they are isotopes of each other.

  
  

• U-235 has 235 neutrons, U-238 has 238 neutrons and they are ions of each other.

• U-235 and U-238 have 92 neutrons and they are ions of each other.